/*
 * Universally Unique IDentifier (UUID)
 * Copyright (c) 2008, Jouni Malinen <j@w1.fi>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Alternatively, this software may be distributed under the terms of BSD
 * license.
 *
 * See README and COPYING for more details.
 */

#include "includes.h"

#include "common.h"
#include "uuid.h"

int uuid_str2bin(const char *str, u8 *bin)
{
    const char *pos;
    u8 *opos;

    pos = str;
    opos = bin;

    if (hexstr2bin(pos, opos, 4))
        return -1;
    pos += 8;
    opos += 4;

    if (*pos++ != '-' || hexstr2bin(pos, opos, 2))
        return -1;
    pos += 4;
    opos += 2;

    if (*pos++ != '-' || hexstr2bin(pos, opos, 2))
        return -1;
    pos += 4;
    opos += 2;

    if (*pos++ != '-' || hexstr2bin(pos, opos, 2))
        return -1;
    pos += 4;
    opos += 2;

    if (*pos++ != '-' || hexstr2bin(pos, opos, 6))
        return -1;

    return 0;
}


int uuid_bin2str(const u8 *bin, char *str, size_t max_len)
{
    int len;
    len = os_snprintf(str, max_len, "%02x%02x%02x%02x-%02x%02x-%02x%02x-"
            "%02x%02x-%02x%02x%02x%02x%02x%02x",
            bin[0], bin[1], bin[2], bin[3],
            bin[4], bin[5], bin[6], bin[7],
            bin[8], bin[9], bin[10], bin[11],
            bin[12], bin[13], bin[14], bin[15]);
    if (len < 0 || (size_t) len >= max_len)
        return -1;
    return 0;
}


int is_nil_uuid(const u8 *uuid)
{
    int i;
    for (i = 0; i < UUID_LEN; i++)
        if (uuid[i])
            return 0;
    return 1;
}
